Whirlpool Top Load Washer Not Draining: Troubleshooting... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) controls the drain pump based on signals from the water level sensor. The MCU sends 120V AC to the drain pump motor via a relay. A faulty sensor or MCU can prevent the drain pump from activating or running properly. Voltage is supplied from the breaker panel, through the power cord, and into the MCU.

Symptoms:

The washer completes the wash cycle, but water remains in the tub for an extended period, or the tub does not drain completely. The drain process is significantly slower than usual.

Possible Causes:

Clogged drain pump filter
Kinked or blocked drain hose
Defective drain pump motor
Partially blocked tub drain
Faulty water level sensor
Main Control Unit (MCU) failure

Solution:

1

Unplug the washer from the outlet.
2

Turn off the water supply valves to the washer.
3

Inspect the drain hose for kinks, clogs, or damage. Disconnect the hose and flush it with water to remove any blockages.
4

Locate the drain pump (typically at the bottom rear of the washer). Access the drain pump filter and clean it thoroughly. Remove any debris or obstructions.
5

Using a multimeter, check the drain pump motor for continuity. A reading of zero indicates a short, while infinite indicates an open circuit. Either requires pump replacement.
6

Verify the water level sensor. If the sensor reports water remaining, the MCU won't trigger the drain pump. Replace the sensor if defective.
7

If all other components test good, the MCU may be faulty. Replacement may be necessary, and licensed technician assistance is recommended.

Safety Warning:

Always disconnect the washer from the power outlet and water supply before performing any repairs. Lock Out Tag Out (LOTO) procedures are critical. Exercise caution when working with electrical components, as 120V AC is present.

Prevention:

Regularly check and clean the drain pump filter every 3-6 months. Ensure the drain hose is free from kinks and obstructions. Avoid overloading the washer with excessive laundry.

Expert Tip:

Many Whirlpool washers have a service mode that allows you to manually activate the drain pump for testing. The exact sequence varies by model, but often involves pressing a combination of buttons on the control panel in a specific order (like Power, then Rinse, then Spin). Consult the technical service manual for the precise service mode entry procedure.

Frequently Asked Questions

•How do I locate the drain pump on my specific Whirlpool top load washer model?

The drain pump is usually located at the bottom rear of the washer. You may need to remove an access panel (held by screws or clips) to reach it. Refer to the washer's service manual or online diagrams for your specific model.

•What resistance value should I expect when testing the drain pump motor?

The acceptable resistance range for the drain pump motor typically falls between 5 and 20 ohms. However, always refer to the washer's service manual for the specific resistance value for your model.

•Where is the water level sensor located and how do I access it?

The water level sensor is typically located either on the side of the outer tub or near the control panel. Accessing it may require removing the top or front panel of the washer. Disconnect the power before attempting access. Refer to the service manual for your model to correctly identify and access the sensor.

Whirlpool Top Load Washer Not Draining: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I locate the drain pump on my specific Whirlpool top load washer model?

•What resistance value should I expect when testing the drain pump motor?

•Where is the water level sensor located and how do I access it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: